Giro's engineers have been hard at work throwing convention out the window, and they've been getting some spectacular results for their efforts. The Giro Selector Aero time trial helmet takes the traditional concept the time trial helmet, and goes one step further. Most time trial helmets rely on the sculpted front end and a tailing edge in the back to channel air around the riders head. The problem is, this design requires a close fit with a rider's bike position, riding style and even the course conditions. Giro gets around this with a tailored approach. The Selector comes with two different lower tails that the rider can switch out to customize their riding position for the best possible results when all that matters is seconds on the clock.

Replaceable tailing section lets you customize the helmet to your riding style, position and course conditions

Vented eye shield aligns with deep internal ventilation channels that allow cool fresh air in, direct it across the rider's head and then exhaust heated air out

I loved this helmet so much when I recieved it. Unfortunately, it was a hair too small and had to be returned. Since it was a closeout,the next size up was sold out so I had to settle for a return. Another 1/4 -1/2 inch and it would have been perfect. The finish was flawless and it was very light weight. Anything Giro is quality so you can't go wrong with this helmet. Just be cautious and conservative with your sizing.